Improvement in printing-telegraphs



S "Sh THOMAS A. EDISON. 2

Improvement in Printing-Telegraphs. N0.126,531. Patented Mag 7,1872.

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AM PHUIU-LITHUGHAPHIC CG MX OSBURNES PROCESS) UNITED STATES PATENTOFFICE.

THOMAS A. EDISON, OF NEWARK, NEW JERSEY, ASSIGNOR TO GOLD AND STOCKTELEGRAPH COMPANY, OF NEW YORK CITY.

IMPROVEMENT IN PRlNTlNG-TELEGRAPHS.

Specification forming part of Letters Patent No. 126,531, dated May7,1872.

To all whom it may concern:

Be it known that I, THOMAS A. EnIsoN, of Newark, in the county of Essexand State of New Jersey, have invented and made an Improvement inPrinting-Telegraphs, and the following is declared to be a correctdescription of the same.

This invention relates to mechanism operated by the printing-lever ormagnet for moving a bolt that connects the type-wheel lever withone oftwo levers that give motion to one of two type-wheels by a step-by-stepmotion. In my present improvement a lever is acted upon by lateral coresfrom the printing-magnet, and this moves a bolt endwise, and the same isheld by a latch. This movement can only be given at the time bothtype-wheels are at the zero or unison-points. The typewheel that islocked by the bolt is revolved, and, as it moves the laststep, incompleting the revolution, the latch is unlocked, and the bolt drawn bya spring to unlock the connection to one type-wheel and lock the leverto the other type-wheel, and that can be operated and impressions takentherefrom until they printing electro-magnet is charged at the zeropointof both type-wheels, when the said bolt is shifted to lock the othertype-wheel.

In the drawing, Figure 1 is a section vertically of the machine. Fig. 2is a sectional plan with the type-wheels removed. Fig. 3 is an elevationof the type-wheels, levers, locking-bolt, and latch. Fig. 4 shows thescrewunison for the type-wheel and the levers thereof; and Fig. 5 is aside view of the bolt-actuatin g lever.

The bed a, frames b, type-wheels c d, typewheel magnet e,impression-magnet f, printing-lever g, paper-feedin g clamps h, androller are similar to devices shown in patents heretofore granted to me,with the exception that the type-wheels are separate from each other,and actuated by independent step-by-step movements; and I remark thatthis improvement may be used with one line-wire and a polarized switchbe employed to direct the current into either of the eleotro-magnets.The armature f and its lever is swing on the fulcrum l, and so also dothe levers c d, and between these and their respective type-wheel shaftsor sleeves are the usual ratchet-wheels,

pawls, and stops, forming step-by-step movements, to rotate thetype-wheel. These may be of any desired character. I make use of a bolt,1', sliding in the lever is, and connecting either the lever c or thelever d to said lever k, and hence moving whichever lever is soconnected, and also the type-wheel with which it is employed. The spring3 moves the bolti into the lever 0, except when otherwise acted upon.Hence the letter-wheel 0 will be operated in the usual manner, and mustbe brought to a zero or blank before the bolt can be unlocked from c andbolted into d. To insure this, the disk n is employed, with one notch init, into which the arm 4 of the lever m can pass; but, at other times,this lever m will be kept from moving by the arm 4 taking the edge ofthe disk n. The lever m is actuated by an armature, n contiguous tolateral poles 6 from the printing-magnet f. \Vhen this lever m isallowed to move, it acts upon the right-angle lever 0, and slides thebolt 1', drawing one end out of the lever c, and entering the other endinto the lever d, and in this position it is held by a latch, s. Theother typewheel, which is the figure or character-wheel d, is nowlocked, and can be moved step by step. Upon the sleeve of thistype-wheel d is a cam, 7, that, as the type-wheel is moved its last stepto the zero-point, acts upon the lever 8 and its arm 9 to lift the latchs and allow the spring 3 to throw the bolt t the other way. The cam 7then clears the end of 8. Hence, if the printing-magnet is charged atthis time, the levers m and 0 will again throw the bolt into at, butotherwise the letter-wheel a will be rotated. Vhen the type-wheel d isbeing rotated the lever m will not be fully moved when theprinting-lever is being moved by its magnet, because the end of the arm10 will take against the edge of the disk a and this disk n is notched,and the notch comes opposite this arm 10 when the type-wheel is at thezero-point. The bent lever it upon the print ing-lever g is moved by thelever m, and thrown into the path of the stud m upon a, and this islocated so as to be moved by that stud as soon as the type-wheel d ismoved. Thereby the lever m will be moved downward, and the arms 4 l0freed from the notches in n n even if the armature should be attractedby any lingering magnetism in the electro-lnagnet f. The screw to on thetype-wheel shaft, stop-lever 10. and relieving-lever 10 actuated by thelateral core of the electro-magnet flare substantially the same as theparts shown in an application heretofore made by me for a patent, andallowed.

I claim as my invention- 1. The lever m and armature n contiguous to thelateral poles 6 of the printing-magnet, for actuating the bolt 1', incombination with ghe arm 4 and disk 12. substantially as set orth.

